+1 for the crest factor suggestion. It would be a nice addition, something even iZotope Insight doesn't have.
I, too, miss the TT dynamic range meter - but technology marches on, and that handy tool is now obsolete. Although AFAIK nothing else out there duplicates TT's algorithm (and ease of use, especially batch mode), Youlean's integrated LUFS is the closest analog to it as a sanity check for your mixes.
Unfortunately, it's possible to constrain a mix's dynamics to a target LUFS and still have a too-low (or too-high) peak-to-average value. The "True Peak Max" display can be somewhat helpful. Assuming your peaks are fairly consistent, you could shoot for a long-term integrated LUFS / Peak target combination and use that the same way you used to use the dynamic range meter.